Response of florda prince peach trees to foliar applications of compost tea, amino acids, cppu and kno3
2011
Abd-El-Rahman, A.S.
This study was carried out during the two successive seasons of 2006/2007 and 2007/2008 on Florda Prince peach aged four years and budded on Nemagard rootstock. Trees were grown in a sandy soil of a private orchard at Wadi EI-Faregh region, Giza governorate, Egypt. Selected trees were sprayed three times at 15 days intervals after fruit set. Treatments were compost tea (Tl), 1000 ppm Amino acids (T2), 10 ppm sitofex (CPPU, 2-Chloro-4-pridyl phenyl urea) (T3), 1000 ppm KNO3 (T4), Tl+T3, Tl+T4, T2+T3, T2+T4, T3+T4, T2+T3+T4, Tl+T3+T4. The control was sprayed with water. Results clarified that the highest incremental increase of yield, fruit physical properties, juice acidity and total amino acids content of fruits received were those sprayed by sitofex treatments. Alternately sitofex decreased markedly both juice TSS and the anthocyanin content. The positive effects on juice TSS and anthocyanin content were observed under both amino acids+KNO3 and the compost tea +KNO3 treatments. In contradiction there treatments markedly decreased the juice acidity percentage. In general triple treatments enhanced the leaf content of macro nutrients and photosynthetic pigments more effectively than both double and single treatments. Generally, sitofex successfully enhanced the yield and most of the fruit characteristics: Its draw backs being Its effect in increasing firmness and acidity, and decreasing TSS and anthocyanin i.e. retarding maturity. In addition, amino acids + KNO3 and the compost tea + KNO3 treatments decreasing afore mentioned draw backs. Triple treatments in a way overcame this draw backs. They increased the leaf content of macro nutrients (basically N a major content of chlorophyll) which resulted in higher photosynthetic pigments which led to higher photosynthetic activity which might be the cause of the enhancements achieved.
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